What are the first three common multiples of 9 and 21?

Find first common multiplule
factor them
9=3*3
21=3*7

lcm=3*3*7=63

63 times 2=126
63 times 3=189

the first common multipules are 63,126,189

The answer is 270 cars.you can do this by making a proportional relationship. for instance, 200 is the whole we are using, so on a “number line” 200 would be over 100%. now, since he sells 35% more, add 35% to 100% to get 135% on the other side of the “number line” on the bottom half, leaving the top half empty.cross multiply 200 by 135 then divide by 100 to get your answer. i hope this , if it did, , if you don’t mind, giving me brainiest! 200/100% } 200 • 135 /100 ? /135%